Comparisons with the vWZ problem: The macroscopic part, \(\xi =O(1)\) , of the splash problem in one dimension resembles the impulsive loading problem studied by von Weizsäcker [1]} and Zeldovich [2]}; see [3]}, [4]} for textbook accounts. We refer to this as the vWZ problem. In the vWZ setting, the gas at zero pressure and temperature occupies the half-space \(x\ge 0\) ; the pressure is suddenly created at \(x=0\)  at time \(t=0\)  and removed at \(t=t_r\) .
